Its pretty straight forward.
Click on the Control icon, then click on "Google Local Search".
That takes you to Google Maps. On the top search line put in your address or point of interest. If your address is found, google maps will put red push pins on the map. Touch one of the push pins to reveal the address. If that address is the one you want, press the blue arrow pointing to the right. It will show the details of the search. Now press "Send to Vehicle" to have the address sent to your car.
You will find the address in your cars messages menu. From there you can initiate a GPS navigation session.

Of course this all assumes that you have configured the application to talk to the account associated with your car.

Thanks! I actually found the user manual for this app, on the BMW website. It's attached.